1.配置左邊部分--R1和R2R1#conf tR1(config)#ipv6 unicast-routing //開啟IPV6功能R1(config)#inter f0/0R1(config-if)#ipv6 address 2001:1/64//報錯資訊% Incomplete command.R1(config-if)#ipv6 address 2012::1/64R1(config-if)#no shR2#conf tR2(config)#ipv6 unicast-routing R2(config)#inter f0/0R2(config-if)#ipv6 address 2012::2/64R2(config-if)#no sh*Mar  1 00:04:54.171: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up*Mar  1 00:04:55.171: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to upR2(config-if)#endR2#show ipv6 inter f0/0//檢視FastEthernet0/0 is up, line protocol is up  IPv6 is enabled, link-local address is FE80::CE01:DFF:FE08:0   Global unicast address(es):    2012::2, subnet is 2012::/64   Joined group address(es):    FF02::1    FF02::2    FF02::1:FF00:2    FF02::1:FF08:0  MTU is 1500 bytes（省略）//R1、R2連通性測試R2#ping 2012::1Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 2012::1, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/31/56 ms2.配置右邊部分--R2和R3R2(config)#inter f1/0R2(config-if)#ipv6 address 2023::2/64R2(config-if)#no sh*Mar  1 00:08:28.191: %LINK-3-UPDOWN: Interface FastEthernet1/0, changed state to up*Mar  1 00:08:29.191: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet1/0, changed state to upR3(config)#ipv6 unicast-routing R3(config)#inter f0/0R3(config-if)#no shR3(config-if)#ipv6 address ?  WORD                General prefix name  X:X:X:X::X          IPv6 link-local address  X:X:X:X::X/<0-128>  IPv6 prefix  autoconfig          Obtain address using autoconfigurationR3(config-if)#ipv6 address autoconfig（可以直接回車）//裝置IPv6 地址為自動配置：當介面配置為IPV6 address autoconfig後，系統會自動的傳送RS請求，當網路中有裝置在響應此請求，會收到RA迴應資訊。（此迴應無詳細IPV6地址，只有IPV6地址字首）。裝置會根據迴應的IPV6地址字首與本裝置的當前埠的MAC地址做計算後，得到自己的IPV6地址。然後會用該地址傳送DAD地址檢測資訊。如果檢測通過後，系統就會認為此地址可以用，並將這個地址配置到自己的埠上面。R3#show ipv6 interface f0/0FastEthernet0/0 is up, line protocol is up  IPv6 is enabled, link-local address is FE80::CE02:DFF:FE08:0   Global unicast address(es):    2023::CE02:DFF:FE08:0, subnet is 2023::/64 [PRE]      valid lifetime 2591984 preferred lifetime 604784  Joined group address(es):    FF02::1    FF02::2    FF02::1:FF08:0  MTU is 1500 bytes//測試R3#ping 2023::2 Sending 5, 100-byte ICMP Echos to 2023::2, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/38/104 msR3#ping 2012::2Sending 5, 100-byte ICMP Echos to 2012::2, timeout is 2 seconds:.....Success rate is 0 percent (0/5)R3(config-if)#ipv6 address autoconfig ?  default  Insert default route  <cr>R3(config)#inter f0/0R3(config-if)#ipv6 address autoconfig default R3(config-if)#endR3#show ipv6 rouR3#show ipv6 routeIPv6 Routing Table - 5 entriesS   ::/0 [1/0]     via FE80::CE01:DFF:FE08:10, FastEthernet0/0C   2023::/64 [0/0]     via ::, FastEthernet0/0L   2023::CE02:DFF:FE08:0/128 [0/0]     via ::, FastEthernet0/0L   FE80::/10 [0/0]     via ::, Null0L   FF00::/8 [0/0]     via ::, Null0//測試R3#ping 2023::2Sending 5, 100-byte ICMP Echos to 2023::2, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/31/52 msR3#ping 2012::2Sending 5, 100-byte ICMP Echos to 2012::2, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 20/28/56 ms感謝思科資源。